/*
 * Copyright 2011 Clean GWT
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.cleangwt.web.shared;

import com.cleangwt.json.client.CollectionSerializer;
import com.cleangwt.json.client.JsonValueSerializer;
import com.cleangwt.json.client.MapSerializer;
import com.cleangwt.json.client.NumberSerializer;
import com.cleangwt.json.client.StringSerializer;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONValue;

/**
 * The {@link PagedCriteria} json serializer.
 * 
 * @author Jess
 * @version 1.0
 * @since 1.0
 */
public class PagedCriteriaSerializer extends JsonValueSerializer<PagedCriteria> {

  private static PagedCriteriaSerializer impl;

  /**
   * @return the instance of {@link PagedCriteria} serializer
   */
  public static PagedCriteriaSerializer get() {
    if (impl == null) {
      impl = new PagedCriteriaSerializer();
    }
    return impl;
  }

  private PagedCriteriaSerializer() {
  }

  @Override
  public JSONValue toJson(PagedCriteria value) {
    JSONObject jsonObject = new JSONObject();
    jsonObject.put("pageStart", NumberSerializer.get().toJson(value.getPageStart()));
    jsonObject.put("pageSize", NumberSerializer.get().toJson(value.getPageSize()));
    jsonObject.put("sortedColumns", CollectionSerializer.get(StringSerializer.get()).toJson(
        value.getSortedColumns()));
    jsonObject.put("sortedDirections", CollectionSerializer.get(StringSerializer.get()).toJson(
        value.getSortedDirections()));
    jsonObject.put("criteria", MapSerializer.get().toJson(value.getCriteria()));
    return jsonObject;
  }

}
